Draftsman&#39;s template



yz 1952 J. F. CQLLINS 2,604,702

DRAFTSMANS TEMPLATE Filed Feb. 2. 1951 I 26 27 2s 29 Q i 1 13 I4 l5 I6 IO I L Q: J

32 3s 36 FIG. 34 25 I8 24 I857 n 26 27 l 26 I 29 I? 3 e 22 I9 I 22 Z I I 25 l0 v25 INVENTOR JOSEPH F COLLINS 6f fw k ATTORNEY Patented July 29, 1952 UNITED STATES PATENT OFFICE 2,604,702 I DRAFTSMANS TEMPLATE Joseph F. Collins, Washington, D. 0. Application February 2, 1951, Serial No. 209,178

10 Claims.

My invention relates to a draftsmans template.

A primary object of the invention is to provide a template which will greatly' facilitate accurately and speedily drawing, end views of standard nuts, bolts, screws and the like, which have polygonal heads and circular shanks or openings.

A further object isito provide a device of the above mentioned character which is highly simplified, compact, sturdy and inexpensive to manufacture.

Afurther object is to provide a template for use in drawing hexagon head nuts and bolts, wherein the circular representations of the nut bores or bolt shanks are always concentrically located with the hexagon portion, and it is unnecessary to use a compass, T-square, triangles or other drafting instruments.

A further object is to provide a template of the above-mentioned character which remains in a fixed position on the drawing while the complete end view of the nut or bolt is drawn by the draftsman.

A still further object of the invention is to provide a template for drawing standard hexagon nuts and bolts and embodying adjustable slides which are easy to manipulate and positive and accurate in operation.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and inwhich like numerals are employed to designate like parts throughout same,

Figure 1 is a plan v ew of a draftsmans template embodying my invention,

Figure 2 is a similar view showing a part of the template in a different operating position,

.Figure 3 is a central vertical longitudinal section taken on line 3-3 of Figure 1, and,

Figure 4 is a central vertical transverse section taken on line 4-4 of Figure l. v

In the drawings, where for the purpose of illustration is shown a preferredembodiment of my invention, the numeral l designates a flat, thin, rectangular plate or sheet formed of transparent plastics material such as generally used in making drafting triangles, stencils and the like. The plate In may be formed of opaque material such as sheet metal, if desired, but it is preferred to use a transparent material. The plate I0 is somewhat elongated, as shown, and provided at its transverse center with a, longitudinal row of longitudinally spaced hexagonal openings I I, l2, l3, l4, l5 and iii, of different sizes, corresponding V Y 2 to the head or body sizes of standard hexagon bolts, screws and nuts. The sizes of the hexagonal openings H to Hi increase successively from one end of the plate 10 to the other, and while I have shown six different sizes of openings, corresponding to six standard sizes of bolts or nuts, it should be understood that any desired number of openings may be provided in the row. As one preferred embodiment, I have shown the hexagonal openings II to [6 corresponding to standard hexagon bolt and nut sizes from A; of an inch in diameter to of an inch in diameter, each successive size being 1 5 of an inch larger than the next preceding size. The numeral ll designates standard nut and bolt size markings on the plate Ill, adjacent to the corresponding hexagonal openings II to It inclusive. If desired, the size markings I! may be omitted. Also, I do not wish to restrict the invention to the drawing of hexagon head bolts, nuts and the like, and accordingly, the openings II to [6 may be square or any other desired shape.

The plate I0 is provided along its longitudinal edges and upon one side only with straight parallel longitudinal ribs or shoulders l8, projecting a slight distance abovethe top face of the plate, and preferably integral therewith. Similar parallel straight transverse ribs or shoulders [9 are formed upon the same side of the plate It at its opposite ends and the ribs [9 have their upper faces flush with the upper faces of the ribs l8 and are likewise integral with the plate H). The longitudinal and transverse ribs I8 and 19 thus form a continuous rectangular marginal wall about the rectangular plate 10 upon one side of the same.

Thin plates or strips 20 of sheet metal or the like are mounted upon the transverse ribs [9 and extend for the entire lengths of the same and are rigidly secured to the ribs [9 by small screws 2|, or the like. If desired, the strips 20 may be formed of transparent material. The inner longitudinal edges of the strips 20 project laterally inwardly of the ribs ill for forming straight transverse grooves 22 at the opposite ends of the template and the gr0ovesf22 extend for the entire distance between the longitudinal ribs l8, as

shown. I

Elongated rectangular plates or slides 23 and 24 are slidably mounted upon the plate l0 and have their opposite ends engaging in the grooves 22 formed by the stripsm. The slides 23 and 24 are preferably formed of the same transparent plastics material as the plate I0, and the slides have parallel straight longitudinal edges adapted to contact the parallel longitudinal ribs l8 which serve as stops. The slides 23 and 24 are freely shiftable laterally over the plate [0, and may be provided at their longitudinal centers and in their opposite longitudinal edges with finger receiving notches 25 to aid in shifting the slides laterally.

The slide 23 is provided at its transverse center with a longitudinal row of longitudinally spaced circular openings 26,21, 28, 29, and 3|, corresponding to the bore or shank diameters of standard hexagon nuts and bolts between A; and of an inch. The openings 26 to 3| are arranged in lateral alignment with the hexagonal openings [I to IS. The slide 24 is likewise provided at its transverse center with a longitudinal row of longitudinally spaced circular openings 32, 33, 34, 35, 38 and 31, likewise arranged in lateral alignment with the hexagonal openings H to- H5.

The openings 32 to 31 vary in diameter correspending to the various sizes of hexagon bolts and nuts represented, and the, openings 32 to 3'! represent the distancesacross flats-onthe various hexagon nuts and bolts provided for by the template. The circles drawn with the openings 32 to 31 are inscribed within the hexagonalopenings H to H5 whenanend view of a nut orbolt is. drawn, and these circlesare tangent to the sides or fiat faces-of the hexagonal heads or body portions. Theslides 23 and 24 may be further provided with index lines- 38 radiating from each circular opening, and adaptedto align with similar index lines 39, .provided on theplate l0 and radiating from the hexagonal openings II to iii, as shown.

The slides 23 and 24 have-equal widths, and

each slide-is one-third as wide as the distance between the shoulders l8. .When either slide 23 or 24 is shifted into contact with the adjacent shoulder I8 and the otherslide shifted into contact with the first slide, Figure 2, the circular openings of the last-mentioned slide are positioned ever and exactly-concentric with the hexagonal openings H to It. The slide which is spaced laterally of the row of hexagonal openi ings and engaging one shoulder 18 thus forms a positive stop for the other slide positioned over the hexagonal openings. The slides 2-3 and 24 are held against longitudinal movement by the transverse ribs [9, butare'freely shiftable laterally.

Accordingly, in the use of the template, the device is positioned at the desired point on the drawing,- and the outline-of the hexagonal nut or bolt is drawn by using-a selected one of the hexagonal openings I l to Hi. During this operation, the slides 23 and 24 are shifted away from the center portion of theplate 20 and may engage the shoulders l8, Figure 1. This exposes the central portion of the plate 10 so that the draftsman may move his pencil or pen point about the selected hexagonal opening. When this operation is completed, either one of the slides 23 or 24 is shifted to thecentral position, Figure 2, and its longitudinal edge nearest the other slide contacts the other slide which is also in contact with the adjacent shoulder I8. This positively positions the circular openings of the selected slide over the hexagonal openings ll to it, so that the circles may be drawn exactly concentric with the hexagonal openings. -When this has been done, the first used slide is shifted into contact with the adjacent shoulder 18, and the other slide is. shifted to the central position wherein it engages the innermost-longitudinal edge of the first used slide. The circular openings of this second slide are now directly over and concentric with the hexagonal openings H to IE, so that the end view of the nut or bolt may be completed.

It is thus seen that the complete end View of the nut or bolt may be drawn without changing the position of the plate l0, and the alignment of the circular openings in the slides 23 and 24 with the hexagonal openings is accurate and positive. The slides may be shifted rapidly with a mere flick of the finger, and the draftsman is assured of having the shank of the bolt or bore of thenutgbeing drawn exactly concentric with the hexagonal head or body portion. The device is highly simplified, inexpensive to manufacture and convenient to use. It should save a great deal of time for draftsman in the usually laborious task of accurately drawing hexagonal nuts and bolts. Ordinarily, the only way that this may be done accurately is by the use of a compass, T-square and triangles, but with my template, the entire operation is rendered very simple and the results are accurate.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A draftsmans template comprising a plate having an opening to guide a drawing implement, a pair of slides mounted above the plate for movement and having openings to guide a drawing implement and adapted to register with the first-named opening when the slides are in selected positions, and stop means connected with the plate and engaging each slide to limit its movement in one direction, each slide forming a stop for the other slide when the other slide is in the selected position with its opening in registration with the first-named opening.

2. A draftsmans template comprising a plate havingv an opening to' guide a drawing implement, a pair of opposed slides mounted above the plate for movement toward and away from each otherand having openings to guide a drawing implement and adapted to register with the first-named opening when theslides are in selected positions, and stop means connected with the plate and engaging each slide to limit its movement away from the other slide, each slide contacting said stop means and the other slide and forming a stop for the other slide when the other slide is in the selected position with its opening in registration with the first-named opening.

3. A draftsmans template comprising a plate having a polygonal opening to guide a drawing implement, a pair of opposed slidesmounted upon the plate for movement toward and away from each other and having circular openings to guide a drawing implement and adapted to register concentrically with the polygonal opening when the slides are in selected positions, the circular openings of the slides being of different diameters, and stop means connected with the plate and engaging each slide to limit its movement away from the other slide, each slide contacting, said stop means and the other slide and forming a stop for the other slide to position the other slide in said selected position.

4. A draftsmans template comprising a plate having a row of spaced openings, each opening being adapted to guide a drawing implement, a pair of opposed slides mounted upon the plate for movement toward and from each other, each slide having a row of spaced openings arranged in lateral alignment with the openings of the plate and adapted to register concentrically with the openings of the plate when the slides are shifted to selected positions, and stop means connected with the plate and engaging the slides to limit their movement away from each other, each slide contacting the stop means and forming a stop for the other slide to position the other slide in said selected position.

5. A draftsmans template comprising a plate having a row of spaced polygonal openings of different sizes, a pair of opposed slides mounted upon the plate for movement toward and from the row of polygonal openings, each slide having a row of spaced circular openings of different sizes corresponding to the sizes of the polygonal openings and arranged in lateral alignment with the polygonal openings and adapted to register concentrically with the polygonal openings when the slides are shifted to selected positions over the row of polygonal openings, the circular openings of one slide being of different sizes than the circular openings of the other slide, and stop means carried by the plate for engagement with the slides to limit their movement away from the row of polygonal openings, one slide engaging the stop means and forming a stop for the other slide when the other slide is in the selected position with its circular openings in concentric registration with the polygonal openings.

6. A draftsmans template comprising a relatively wide rectangular plate provided near its transverse center with a row of spaced polygonal openings of different sizes, a pair of opposed relatively narrow slides of equal width mounted upon the plate for lateral movement toward and from each other, means carried by the plate and engaging the slides to guide them during their lateral movement and holding them against longitudinal movement with respect to the plate, each slide having a row of spaced circular openings of different sizes corresponding to the sizes of the polygonal openings of the plate and arranged in lateral alignment with the polygonal openings, each slide being shiftable to a position over the row of polygonal openings wherein its circular openings register concentrically with the polygonal openings while the other slide is spaced laterally from the row of polygonal openings, and stop means carried by the plate and engaging one slide when it is spaced laterally from the row of polygonal openings and the other slide is positioned over the row of polygonal openings with its circular openings in concentric registration therewith, said one slide then forming a stop contacting said other slide to positively position the same over the row of polygonal openings.

7. A draftsmans template comprising a relatively wide rectangular plate provided near its transverse center with a row of spaced polygonal openings of different sizes, the plate being provided near its longitudinal edges with raised portions forming stops and near its ends with raised portions forming guides, and a pair of relatively narrow opposed slides mounted upon the plate for lateral movement toward and from each other and having their ends engaging the guides so that the slides may be shifted laterally with respect to the plate while being held against longitudinal movement, each slide having a row of spaced openings of different sizes corresponding to the sizes of the polygonal openings and arranged in lateral alignment with the polygonal openings, each slide being shiftable over the row of polygonal openings so that its openings register with the polygonal openings, the other slide then engaging said stop and being spaced laterally from the row of polygonal openings and forming a stop engaging the slide which is positioned over the row of polygonal openings.

8. A draftsmans template comprising a plate having a plurality of polygonal openings of different sizes, a slide arranged adjacent to one side of the plate for movement over the plate and having a plurality of circular openings of different sizes arranged for concentric registration with the polygonal openings when the slide is shifted to a selected position, and means carried by the plate and engaging the slide to limit the extent of its movement.

9. A draftsmans template comprising a plate having a plurality of spaced polygonal openings of different sizes, a slide arranged adjacent to one side of the plate for movement over the plate and having a plurality of spaced circular openings of different sizes and adapted to register concentrically with the polygonal openings when the slide is shifted to a selected position, guide means connected with the plate and slide and serving to prevent the slide from moving in one direction relative to the plate, and stop means connected with the plate and engaging the slide to limitits movement in a direction at right angles to the guide means, the stop means serving to position the slide in the selected position with its circular openings in registration with the polygonal open ings.

10. A draftsmans template comprising a plate having a plurality of spaced polygonal openings of different sizes, a pair of opposed slides mounted adjacent to one side of the plate for movement toward and from each other, each slide having a plurality of spaced circular openings of different sizes corresponding to the sizes of the polygonal openings and arranged to register concentrically with the polygonal openings when the slides are shifted to selected positions, the openings of one slide being of different sizes from the openings of the other slide, and stop means connected with the plate and engaging the slide to limit their movement away from each other, one slide engaging the stop means and forming a stop for the other slide when the other slide is in the selected position and its circular openings are in registration with the polygonal openings of the plate.

JOSEPH F. COLLINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date D. 147,743 Cambron Oct. 28, 1947 1,202,041 Fabricius Oct. 24, 1916 1,821,369 Wetterstrand Sept. 1, 1931 2,543,714 Bednarczuk Feb. 27, 1951 

